Future in Particle Physics!

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Future in Particle Physics!

• ECFA
• Future of Accelerator-Based Particle Physics in
  Europe
• HEPAP
• Long Range Planning for U.S. High-Energy Physics
• ACFA
• coming up soon?

F. Linde, 14-December-2001, Amsterdam
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Input to ECFA report

• Laboratories
• L. Maiani CERN views for the future
• A. Wagner Views on the future of DESY
• J. Bagger HEPAP sub-panel on long range
  planning for U.S. High energy physics
• F. Gilman The U.S. high energy physics advisory
  panel white paper
• A. Skrinsky Russian HEP activity status and
  perspectives
• S. Komamiya Report on ACFA activities
• Projects
• F. Gianotti Physics perspectives with the LHC
  within Standard Model
• P. Sphicas Physics perspectives with the LHC
  SuSy and other physics beyond SM
• K. Hubner New acceleration methods and plans
  for high intensity proton machines
• R. Klanner Future perspectives for e?p physics
• D. Miller Physics potential and concrete
  perspectives for lt1 TeV linear colliders
• P. Zerwas Muti-TeV lepton colliders the
  physics potential
• J.P. Delahaye CLIC, a two beam multi-TeV e?
  linear collider
• A. de Roeck CLIC, a compact linear collider
  experimentation and physics potential
• M. Tigner Perspectives and experimental
  environment of a muon collider
• P. Janot What physics at muon colliders
• K. Peach Neutrino factories

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Physics challenges

• many questions, e.g.
• matter ? anti-matter?
• dark matter?
• three families?
• generation of mass?
• proton decay?
• charge quantization?
• unification?

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Progress within the Standard Model

• Outstanding issues
• Higgs mechanism
• quark-gluon plasma
• CP violation quark sector
• neutrino sector

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Progress beyond the Standard Model

• Approaches
• Rare/forbidden decays
• New particles
• New interactions
• Unification
• Unknown look into the sky!

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Experimental opportunities
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Future G projects

• Hadron-hadron (CERN Fermilab)
• LHC upgrades
• Luminosity upgrade 1034 ? 1035 cm-2s-1 easy
  (you want it?)
• Energy upgrade difficult (we might want it!)
• Very large hadron colliders VLHC
• Lepton-lepton (CERN, DESY, US, Japan)
• e?e? linear colliders TESLA, NLC, JLC, CLIC
• ???? collider
• Intense neutrino beams (CERN, FermiLab, Japan)
• ??, ??, ?e, ?e

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Very large hadron collider

• Fermilab
• VLHC phased project
• (240 km circumference tunnel)
• Issue cost, cost and cost

dipole magnets interesting (transmission line)

• Physics
• The unknown, new, exciting!
• Continuation of LHC
• But also clear you only embark on this well after
  the LHC has cleared the TeV energy range

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Intense neutrino beams (? ????collider?)

• SPL Ep? 2-15 GeV, 1016 p/s
• target p ? ??
• ?-decay ?? ? ??
• ?-cooling reduce ?E?, E??50 GeV
• ?-decay ?? decay in ring
• ?-collider future music

p???????e??e?? ????e??e??
Japan, CERN FermiLab

• Physics
• Near (lt1 km, high rate)
• structure functions
• CKM matrix
• new physics
• Far (102-104 km, low rate)
• oscillations
• CP

neutrino beam
neutrino beam
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???? collider

• Everything e?e? linear collider offers with as
  advantages
• Far less Beamstrahlung (negligible)
• Far better calibration (?E?5 keV, energy spread
  polarization)
• Much larger couplings to Higgs bosons
  (???/?ee?4?104)
• ? Higgs lineshape!

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Linear e?e? collider cartoons
SLAC
Japan
DESY
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Linear e?e? collider real work
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Lepton colliders e?e?

• e?e?
• Higgs
• Supersymmetry
• lots more (QCD, )
• X-ray FEL option
• biology
• material
• ?e? and ?? options

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Making choices!

• HEP creativity exceeds available finances ? must
  be selective
• allow orginal, excellent, new, ... proposals ? be
  flexible
• limit (expensive) duplications ? operate globally
• sufficient RD before technology decision ? be
  economical
• realistic time schedules!

• accelerator ? non-accelerator
• links to astro-physics, cosmology and nuclear
  physics
• plan for the unexpected
• fill no-physics between large accelerator
  projects

• Fairly well covered already
• B-physics HeraB/Tevatron - BaBar/Belle - LHCb
• Heavy-ion physics RHIC - ALICE

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ECFA recommendations

• Make the LHC a success i.e. get it running
  timely!
• Exploit ongoing facilities optimally in pre-LHC
  era
• Stimulate accelerator RD _at_ home institutes
• Next project a sub-TeV (?s ? 400 GeV) e?e?
  linear collider
• (irrespective of the findings of the LHC i.e.
  justification exists today)
• Coordinated RD effort to study ?-storage ring
• (SPL ? intense ?-beam)
• VLHC, CLIC ?-collider far future i.e. beyond
  2020
• (coordinate RD efforts)

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Linear e?e? colliders

• pp ? e?e? colliders
• complementary (SppS ? LEP ? Tevatron)
• Z, W discovery ? Z factory
• mt prediction ? top discovery
• mH prediction ? Higgs discovery?
• pp discovery physics (? Nobel exp.)
• e?e? precision physics (? Nobel th.)

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e?e? linear collider physics

• Precision Higgs study (mH, spin, ?H, ?HHH, ?H?ff,
  )
• Super-symmetry spectroscopy (threshold scans)
• Precision measurements thereby probing higher
  energies
• Anything new and unexpected (unlikely to escape
  LHC though)

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e?e? linear collider Higgs
Higgs signals
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Prospects (limit duplications BTeV, !)